Outpouring from scoundrel in lawsuit (7)
I believe the answer is:
cascade
'outpouring' is the definition.
(I've seen this in another clue)
'scoundrel in lawsuit' is the wordplay.
'scoundrel' becomes 'cad' (cad is a kind of scoundrel).
'in' means one lot of letters goes inside another.
'lawsuit' becomes 'case' (a legal case).
'cad' inserted within 'case' is 'CASCADE'.
'from' is the link.
(Other definitions for cascade that I've seen before include "Shower" , "Dramatic fall" , "Rush" , "Waterfall or deluge" , "Torrent" .)